A device and method for aerodynamic efficiency of a wind turbine array used in wind tunnel experiments

Abstract

The invention discloses a device and method for aerodynamic efficiency of a wind turbine array used in wind tunnel experiments. 1) modeling the device with three-dimensional modeling software; Efficiency; 3) Build a wind turbine array aerodynamic efficiency device for wind tunnel experiments; 4) Equipment safety inspection; 5) Obtain the set wind speed; 6) Collect the thrust and output current of the benchmark first wind turbine at different speeds; 7) Constructing the wind turbine array; 8) Completing the aerodynamic data curve of the first wind turbine in the wind turbine array; 9) Completing the aerodynamic data curves of all the wind turbines in the wind turbine array; 10) Data processing. The device comprises a support base plate, a six-component balance arranged on the support base plate and a wind machine fixed on the six-component balance. The invention can accurately collect the power data and the dynamic load variation of the wind turbine at different positions in the test wind generator array under various wind speeds, and more accurately fit the aerodynamic characteristic curve of the wind turbine.

Description

Device and method for aerodynamic efficiency of wind turbine array for wind tunnel experiment technical field The present invention relates to the field of wind tunnel test and wind turbine array aerodynamic characteristic test, in particular to a Apparatus and method for testing the aerodynamic efficiency of a wind turbine array. Background technique [0002] The installed capacity of wind power generation has been increasing continuously in recent years, accounting for almost all the electricity growth in the five years. At present, my country's newly installed capacity is nearly 30 million kilowatts. Characteristics of wind turbine operating flow conditions under various operating conditions It is a long-term high turbulence degree. The actual wind turbine flow is generally high turbulence and the wake of the previous wind turbine rotation. In order to Understanding the distribution and dynamics of this flow structure is critical for quantitative analysis of unstea...

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Problems solved by technology

At present, there are still some problems to be solved. In the wind tunnel experiment, there is an inevitable difference between the Reynolds number and the real environment, and the model wind generator is generally made of a micro DC motor. The electromechanical conversion efficiency of this type of motor The performance is usually poor, so it is necessary to accurately test the performance of the small wind turbine before the wind tunnel experiment. The existing research generally uses the electric power of the motor that is relatively easy to obtain to characterize the performance of the wind turbine.

However, due to the mechanical and electrical losses of the generator, the value of the electrical power will obviously be less than the shaft power output by the wind rotor, and since the output electrical power is affected by the characteristics of the modeled generator, it will get wrong information about the wind performance, while some other The research uses the known DC generator equations to estimate, but this method requires too many motor characteristic parameters, and it is not clear whether this method can reliably estimate the mechanical power of the wind turbine

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